Dishwasher Rack Corner Spray Manifold for Corner Cleaning Coverage
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Solution Overview
Problem
Existing dishwasher systems lack effective distribution and control of washing fluid to enhance cleaning, particularly in corner regions of the rack, where spray patterns often fail to adequately reach and clean items.
Innovation Solution
A dishwasher system featuring a multi-tube feed arrangement with a rack-supported manifold and diverter valve mechanism, which selectively directs washing fluid to rotatable and bifurcated spray arms, including corner nozzles to ensure thorough cleaning of both interior and exterior surfaces of items, especially in corner regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple spray arms are provided within a single wash tub, then spray patterns are enhanced, but corner regions of the rack still receive inadequate washing fluid coverage
Solution Approach 1:
The spray system is segmented into multiple independent spray arms (upper, lower, intermediate) with distinct spray patterns. Each spray arm targets specific zones within the wash tub, ensuring comprehensive coverage including corner regions that would be missed by a single spray arm.
Solution Approach 2:
Each spray arm is designed with specific nozzle arrangements to create localized spray patterns optimized for different zones. The upper spray arm targets upper rack areas, the lower spray arm covers the bottom and corner regions, and the intermediate spray arm addresses mid-level zones, ensuring every corner region receives appropriate washing fluid coverage.
2Adaptability or versatility
If the upper rack is made vertically adjustable, then adaptability is improved, but fluid connection reliability becomes more difficult to maintain
Solution Approach 1:
The fluid connection system is made dynamic to accommodate vertical rack movement. The flexible hose and movable manifold assembly allow the fluid connection to adapt to different rack positions while maintaining sealed connections, enabling both vertical adjustability and connection reliability.
3Loss of time
If separate fluid conduits and valving are employed to control flow timing to each spray arm, then flow control precision is improved, but device complexity increases
Solution Approach 1:
The washing cycle employs periodic action by sequentially activating different spray arms at predetermined intervals. The controller activates the upper spray arm during specific phases, the lower spray arm during other phases, and the intermediate spray arm during intermediate phases, achieving precise flow timing control without requiring complex simultaneous multi-conduit valving systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration provides enhanced cleaning efficiency by ensuring that all surfaces, including corners of glassware, receive adequate washing fluid, improving the overall cleaning operation and accommodating vertical adjustments of the upper rack.
Implementation Method 1
a recirculation pump assembly to which the multi-tube feed arrangement is connected
Implementation Method 2
a diverter valve mechanism is employed to selectively deliver washing fluid from a recirculation pump assembly to the various spray arms of the dishwasher
Implementation Method 3
corner nozzles to ensure thorough cleaning of both interior and exterior surfaces of items, especially in corner regions
Data Source
AI summary
A dishwasher includes a rack provided with interior and exterior corner nozzles to direct washing fluid onto interior and exterior surface portions of an object placed in a corner of the rack.